A 12-foot ladder leans against a building. The top of theladder leans against the wall 10.5 feet from the ground. Whatis the angle formed by the ground and the ladder?

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Q: against

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Q: A 28-ft ladder leans against a building so that the angle between the ground and the ladder is 75°.

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.